Allah has undertaken to provide for one who leaves his home (only) to fight for His cause and to affirm the truth of His word; Allah will either admit him to Paradise or will bring him back home from where he had come out, with his reward and booty. (Using translation from Muslim 1876c)   

قَالَ رَسُولُ اللَّهِ ﷺ «تَكَفَّلَ اللَّهُ لِمَنْ خَرَجَ مِنْ بَيْتِهِ لَا يُخْرِجُهُ إِلَّا جِهَادٌ فِي سَبِيلِ اللَّهِ وَتَصْدِيقُ بِكَلِمَاتِهِ أَنْ يُدْخِلَهُ الْجَنَّةَ أَوْ يَرُدَّهُ إِلَى مَسْكَنِهِ الَّذِي خَرَجَ مِنْهُ مَعَ مَا نَالَ مِنْ أَجْرٍ أَوْ غَنِيمَةٍ»